Abstract
From earlier investigations it has been deduced, that actinomycetes, which colonize and damage the rootlets of apple trees, might be the cause of soil sickness. Attempts to isolate these actinomycetes had been without success for a long time. Foremost, recognizing that plant hormones play a decisive role in the colonization of rootlets by actinomycetes and by introducing such plant hormones into culture media it succeeded to isolate a species of actinomycetes, which appeared not earlier. Apple seedlings showed clear diminution of growth in a soil that was steamed and inoculated with this isolate. Additionally, a colonization of rootlets by actinomycetes could be observed, which corresponded in frequency and appearance to earlier results from investigations with roots in sick soils. The results are considered a further underpinning of the assumption that root pathogenic actinomycetes are the cause of apple replant disease.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-sa. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
Plant hormones in culture media enabled isolation of an actinomycete species.
- Taxon
- apple trees
Malus domesticae1 - Outcome
- isolate a species of actinomycetese0
- Comparator
- not earliere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by introducing such plant hormones into culture media it succeeded to isolate a species of actinomycetes, which appeared not earlier”
e1“rootlets of apple trees”
Claim · model-written summary
Apple seedlings grew less in steamed soil inoculated with the isolate.
- Taxon
- Apple seedlingsMalus domesticae0
- Treatment
- soil that was steamed and inoculated with this isolatee0
- Interactor
- isolatee0pathogen
- Outcome
- growthe0
- Direction
- diminutione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apple seedlings showed clear diminution of growth in a soil that was steamed and inoculated with this isolate.”
Claim · model-written summary
Actinomycetes colonized seedling rootlets with a frequency and appearance corresponding to earlier sick soil observations.
- Taxon
- Apple seedlingsMalus domesticae1
- Organ / stage
- rootletse0
- Interactor
- actinomycetesActinomycetese0pathogen
- Outcome
- colonization of rootlets by actinomycetese0
- Comparator
- earlier results from investigations with roots in sick soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a colonization of rootlets by actinomycetes could be observed, which corresponded in frequency and appearance to earlier results from investigations with roots in sick soils.”
e1“Apple seedlings”
Claim · model-written summary
The authors interpret the findings as further support for pathogenic actinomycetes causing apple replant disease.
- Taxon
- appleMalus domesticae0
- Interactor
- actinomycetesActinomycetese0pathogen
- Outcome
- apple replant diseasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root pathogenic actinomycetes are the cause of apple replant disease”
The same questions in other papers
inoculation · growth · Malus domestica (apple)Positive and negative results
10 papers in the same direction as this paper · 31 in the opposite direction
- positive
- positive
- positive
38 papers more in this group
See all 42 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.